Magneto-electric machine for combined ignition and illuminating purposes.



- F. R. SIMMS. MAGNETO ELECTRIC MACHINE FOR COMBINED IGNITION ANDILLUMINATING PURPOSES.

Patented Sept. 12, 1916.

APPLICATION FILED JULY 21. I913.

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LVIAGNETO COMPANY, BT-Z-OOMFIELD,

'naennro-nrnormo MACHINE son COMBINED IGNITION AND a ruarosns.

NEW JERSEY; A CORPORATION OF NEW ILLUMINATING anors.

\ Specification of Letters Patent.

Patented Sept. 12, 1916.

Application filed July 21, 1913. Serial No. 780,376.

fonll'ihhom it may concern Be it known that I, FREDERICK RICHARD SIMMs,a subject of the King of Great Britain, residing at 6 Charles street,Berkeley Square, London, England, have mvented new and usefulImprovements in Magneto- Electric Machines for Combined Ignition andIlluminating Purposes, of which the followingis a specification.

This invention'relates to magneto-electr c machines for generatingignition and illuminating current such as is required, for example, inthe case of motor road veh cles.

In the specification of former British Patent No. 19122 of August 25,1911 there is described aniagneto-electric machine of this class inwhich a pair of armatures is employed which rotate between two pairs'oipole-pieces, one of these armatures being deslgned to generate currentfor the ignition of the explosive charge of an internal combustionengine, while the other is utilized for generating current for supplyingthe head and other lamps of the vehicle to which the gear is fitted.

Now, the object of the present invention is to improve the constructionof machines of this type chiefly in the direction of the reductionoftheir weight and dimensions, and-at the same time a more powerful motoris produced-for starting an internal combus v tion engine than thepermanent magnet type of motor;

To this end according to the invention, in lieu of providing a set ofpermanent magnets for furnishing the magnetic fields for both thelighting and ignition armatures, I now make use of permanent magnets forproviding the field for the ignition armature only, that for thelighting armature being provided by one or more electro-magnets.

In a suitable arrangement for carrying out the invention I provide apair of straight electro-magnets, the cores of which are arrangedparallel to one another, and a eithen side and near the top of the]')ermanent magnet which provides the magnetic field for the ignitionarmature. The cores of these electro-magnets are mounted in side plates,the lower extremities of which are formed 'as pole-pieces, between whichthe lighting armature .rotates. These pole-pieces are arranged at apolnt above the level of the pole- .magnet c carries the pole-shoes orpieces of the permanent magnet between which the ignition armaturerotates, but, in practice, the side plates may be extended belowthe'latter pole-pieces for structural purposes,'it being understood,however, that the arrangement is such that the field of theelectromagnet is wholly or mainly insulated from the field of thepermanent magnet; for example, the said extension may be in the form ofwings at the ends only of the side plates, and adjacent to the ends ofthe polepieces of the permanent magnet, gaps being provided between thesaid pole-pieces and the extensions which themselves are made withcentral holes or gaps.

In a modified construction of machine I make use of a single coilelectro-magnet instead of the pair of coils as above described, and itwill be understood that the permanent magnet may be either of ahorse-shoe shape, in which event it embraces the electromagnets, or inthe form of two bar-magnets, connectedgtogether at the upper end by atransverse pin or the like. i v

To enable my invention to be fully understood I will describeit byreference to the accompanying drawing, in which Figure 1 is a side viewof one form of magneto-electric machine. constructed according to theinvention. Fig. 2 is a sectional view thereof. Fig. 3 is a side view ofa modified form of the machine, and Fig. 4 is a sectional. end viewillustrating a further modification.

Referring first to the construction illustrated in Figs. 1 and 2, aaretwo straight electro-magnets having the cores b, which cores arearranged parallel to o e another, and c, c arethe side plates in whirfil the cores Z) are mounted and the lower' extremities of which areformed as the pole-pieces. or

shoes (Z between which the lighting arma tine A is designed to rotate.

c is the permanent magnet which, in the arrangei'nent underconsideration, is in the form of a horse-shoe magnet, the upper or yokeend of which embraces the electro magnets (1.. At its lower end thepermanent pieces between which the ignition armature l3 rotates. The

armature A are arranged just above the pole-pieces d for the lightingside plates 0, to which the former pole-shoes are attached, beingextended downwardly at the sides as indicated at for structuralpurposes; the said lateral extensions 0, however, are separated by theslots or gaps g from the pole-pieces f, in order to insulate themagnetic flux of the lighting field from the field of the permanentmagne side plates 0,

' nition purposes.

In the embodiment of my inventibh herein illustrated I have shown coresZ) of the magnet coils eaeh provided at one end with a threaded portion6 indicated in dotted'lines in Fig. 2, which is screwed into one of thewhile the other end of the core is provided with a reduced portion 5which extends through an aperture in the other side plate to which itisconnected by means of the fiat head screw 6 I have also shown the polepieces d, (Z for the lighting armature A, which in this instance areformed integral. with the side plates 0, as supported. upon the polepieces f for the ignition armature B and connected thereto againstaccidental displacement by dowel pins 05 It is to be understood that theslots 9 which I employ for the purpose of insulating the pole pieces 63from the pole pieces 7' do not totally insulate them therefrom. Theprovision of such slots, however,

In the modified form of machine illustrated in Fig. 3, only oneelectro-magnet a is made use of, which magnet isembraced as in thepreceding construction by the permanent magnet e.' In other respectsthis form of machine is similar to that illustrated in Figs. 1 and 2.

Fig. 4 illustrates the construction of the machine in which thehorse-shoe magnet e is dispensed with and in lieu thereof there isemployed a pair of: bar-magnets it. These bar-magnets are connected attheir upper part by means of the pin a which passes through the ,sideplates and through the core I) of the electro-magnet which is madehollow for the purpose.

As will be obvious machines made'as above described are of less weightand occupy less space than one in which permanent magnets are providedboth for illumination and 1g- Furthermore, it will be understood thatsince the power of he field obtained from an electro-magnet is higherthan that of a permanent magnet, the 1mis sufiicient to insure asufiicientindependence of the magnetic fields of magnet proved machinemay be utilized for starting an internal combustion engine, for whichpurpose the illuminating armature would be used as a motor for directlydriving the crank-shaft of the engine.

I claim:

1. In a magneto electric machine for combined ignition and illuminatingand starting purposes, the combination with a permanent magnet, providedwith poleshoes adapted to receivea rotatable armature for generatingignition current, a'nd an electromagnet provided with separate poleshoeslocated Within and supported by the permanent magnet and its poleshoes,said electromagnet being adapted to receive a separate rotatablearmature between the poleshoes thereof for' generating a lightingcurrent.

2. In a magneto electric machine for combined ignition and illuminatingand, starting purposes, the combination with a permanent magnet providedwith poleshoes adapted to receive an ignition armature, an,electromagnet comprising side plates located between the arms of thepermanent magnet and provided with poleshoes supported above thepoleshoes of the permanent magnet, and adapted to receive a rotatablearmature for generating lighting current, and a coil supported betweensaid side plates.

3. In a magneto electric machine for combined ignition and illuminatingand starting purposes, the combination with a permanent magnet providedat its lower ends with poleshoes adapted to receive a rotatable armaturefor generating ignition current,

an electromagnet comprising a pair of side a partial magnetic insulationtherefrom, and v a magnetic coil supported withinthe side plates abovethe poleshoes for the electromagnet.

l. In a magneto electric machine for combined ignition and illuminatingand starting purposes, the combination with a permanent magnet havingvertically disposed portions provided at their lower ends with a pair ofopposed poleshoes adapted to receive between them a rotatable armaturefor generating ignition current, and an electroarranged between saidvertically disposed portions of the permanent mag-

